I was intrigued by XFCE on Wayland so I looked into it.
XFCE is not really available on Wayland yet. XFWM is X11 only and there is no XFCE compositor.
What Leap is doing is running the XFCE panel and apps on Labwc. When I have tried this, “it works” but it is certainly not as polished as XFCE on Xorg.
I am a Wayland fan so overall I support OpenSUSE moving to Wayland. This seems like a bit of disservice to XFCE fans though as I am not sure the DE is ready yet. And the take-away is going to be that it is Wayland that is not working.